其他食品中过敏原检测

TA1物性测试仪又叫质构仪，可对样品的物性概念作出数据化的表述。由于其在食品行业的应用逐渐广泛，测定的物理性状能较好的反映食品质量的优劣，已经得到了研究者们充分的肯定。质构仪可用于测定休闲食品的质构或物性，测试指标包括：硬度、粘性、脆性、稠度、剪切强度等。

食品添加剂的检测，目的在于监督、保证和促进正确合理地使用食品添加剂，确保人民的身体健康。苯甲酸、山梨酸、糖精钠均是常用的食品添加剂，其中防腐剂（苯甲酸、山梨酸）和糖精钠是饮料必测项目。目前关于食品中防腐剂与甜味剂的检测方法的很多，主要涉及的检测方法有薄层色谱法、比色法、离子选择电极测定法、气相色谱法、液相色谱法。 本文主要是参考其它文献对国家标准进行优化，使其检测效果更佳、更实惠。

本文从包装材料的阻水性能出发，利用W3/031水蒸气透过率测试仪检测了某调味粉包装用塑料复合膜的水蒸气透过率，并对试验的过程及设备的原理、参数及适用范围进行了详述，为相关企业解决产品结块问题提供可参考的方向。

本文采用Labthink兰光VAC-VBS压差法气体渗透仪对绿豆饼包装用塑料复合膜样品的阻氧性能进行了检测，并介绍了设备的测试原理、设备的参数及适用范围、试验过程等信息，从而为企业监控所用包装材料的氧气透过量提供参考。

果葡糖浆是由植物淀粉水解和异构化制成的淀粉糖晶，是一种重要的甜味剂。本品为无色或浅黄色、透明的黏稠液体。甜味柔和，具有果葡糖浆特有的香气，无异味。无正常视力可见杂质。因为它的组成主要是果糖和葡萄糖；故称为“果葡糖浆”。 果葡糖浆是由葡萄糖和果糖组成的一种混合生物酶转化糖浆，同时也是一种高甜度的淀粉糖，除作为糖源可替代蔗糖应用于食品加工外，果葡糖浆还具有蔗糖所不具备的优良特性，如在口感上，越冷越甜；甜度；在风味上具有不掩盖性； 冰点温度低，以及在营养和代谢方面的功能性作用等。国家标准 GB/T 20882-2007 果葡糖浆中，将其分为两种类型：F42型（果糖含量不低于 42%[占干物质]的果葡糖浆）和 F55 型（果糖含量不低于 55%[占干物质]的果葡糖浆）。 本方案中使用的仪器设备有：LC-P310 高压恒流泵：1 台；RI 示差折光检测器：1 台；LC-Co310 柱温箱:1 台；LC-310 泵控工作站（带采样功能）：1 套；7725i 手动进样阀：1 套；液相色谱柱：Ca 型阳离子交换柱（7.9mm*300mm，10um）：1 支；葡萄糖标准品、果糖标准物质：各 1 瓶。

食品组成成分复杂，丙烯酰胺的含量很低。目前中国检测食品中的丙烯酰胺含量的方法标准有《 GB/T 5009.204-2014食品中丙烯酰胺含量的测定方法》、《 SN/T 2096-2008 食品中丙烯酰胺的检测方法 同位素内标法》。其中 SN/T 2096-2008与美国食品与药品管理局（FDA）提供的方法基本一致。但内标标记的丙烯酰胺价格昂贵且不易买到，限制了方法的实用性。 天瑞仪器一直致力于为客户提供更完善的解决方案，GC-MS 6800气相色谱-质谱联用仪可用于食品中丙烯酰胺的检测。 本测试方法主要参考《 GB/T 5009.204-2014 食品中丙烯酰胺含量的测定方法》，为客户制定了完善的丙烯酰胺解决方案。

阿斯巴甜、三氯蔗糖、安赛蜜等人工甜味剂属于日本食品卫生法中的指定添加物，相关部门针对允许使用甜味剂的部分食品及使用量制定了使用标准。对于在日本以外的部分地区使用的甜蜜素等其他人工甜味剂，在日本国内属非指定添加物，需对特定的进口食品进行检测。因此，不仅对日本允许使用的人工甜味剂，还是非指定添加物，均需进行定量检测。本文向您介绍使用岛津 LCMS-8050对16种甜味剂进行同时分析的示例。

本文使用配备了示差折光、四毛细管桥粘度及双角度激光光散射三个检测器的 Agilent 1260 Infinity 多检测器 GPC/SEC 系统，配合 PL Aquagel-OH 系列色谱柱，分别以两种不同盐浓度的缓冲液作为流动相，对羧甲基淀粉钠的分子量、分子量分布和分子构造进行了表征，并研究了流动相盐浓度对分子构象的影响。通过与仅配单一示差检测器的GPC/SEC 系统对比得到，1260 多检测器 GPC/SEC 系统，无需建立标准曲线，即可得到更加准确的样品分子量及分子量分布检测结果，同时还可得到样品分子构造和分子构象信息

安捷伦提供完整的解决方案，可帮助您遵循中国烟草企业标准 YQ/T 47.1-2014 分析烟草中的农药残留。经工厂配置、通过化学测试的烟草农残分析仪配备样品前处理试剂盒、全套农药标准样品（包括 168 种标准样品和两种内标化合物）及消耗品，专业工程师提供从样品制备到报告的全面现场培训。确保您快速轻松获得可信的分析结果。

《兽药质量标准》中采用微生物效价测定法进行海南霉素的含量测定，方法缺乏专属性。上海通微分析技术有限公司建立高效液相色谱-蒸发光散射检测法对其进行测定，成功分析样品，可作为《标准》补充方法。

There are many advantages in miniaturizing sample preparation. The use of less solvent reduces solvent cost and waste. Smaller sample sizes are easier to handle, store, and process in the lab. Reduction in sample amount provides cost savings on sample preparation sorbent and substantial decreases in cost associated with the use of labeled compounds as internal standards. With a smaller sample size, it may be possible to use additional labeled compounds for troublesome analytes that are cost prohibitive with larger sample sizes. We analyzed pesticides in food using miniaturized QuEChERS extraction and thultra-efficient ionization source of the Agilent 7010 Triple Quadrupole GC/MS, which reduces injected sample volume by 75%. On average, limits of quantitation (LOQ) ~10 ng/g were reached for 95% of the 126 pesticides studied in apple, carrot, and broccoli. Less matrix injected delivers prolonged uptime and sustained performance and, therefore, lower maintenance costs. By injecting only 25% of the standard 2 μL injection volume and implementing our recommended pesticide analysis method, we analyzed the pesticides at or below threshold MRLs of the EPA, EU, and Japan, 0.01 mg/kg (10 ng/g), which was adequate to monitor exposure.

This Application Note describes an UHPLC/Q-TOF/MS method for screening 240 pesticides and pesticide metabolites in difficult food matrixes. The method benefits from increased chromatographic resolution using the Agilent 1290 Infinity UHPLC System and improved ionization capabilities with an Agilent Jet Stream ionization source. More importantly, the successful screening of analytes is accomplished by the innate sensitivity improvement of the Agilent 6545 Q-TOF LC/MS System and ion transmission tuning to facilitate the optimal ion transmission of small, fragile organic molecules. Targeted MS/MS acquisition was used for analyte quantitation and confirmation. Black tea matrix was chosen for its complexity, and avocado matrix was chosen to represent food commodities with high lipid content. Our results demonstrate that the improved detection of small organic molecules by the 6545 Q-TOF LC/MS System allows the screening and quantitation of most of the targeted pesticides below the maximum residue limits (MRLs) specified by the European Commission regulations.

The presence of hidden nut and tree nut allergens in foods can result in serious health issues, necessitating a method capable of detecting and quantifying them at trace levels using a single robust assay. To find specific peptide markers that can be used to determine the presence or absence of specific nuts in food, proteins unique to 11 tree nuts (almond, pecan, cashew, walnut, hazelnut, pine nut, brazil nut, macadamia nut, pine nut, chestnut, and coconut) and peanut were enzymatically digested and analyzed using accurate - mass Q - TOF LC/MS. Each marker peptide was selected by establish ing its presence in raw and roasted nuts, processed and unprocessed food, abundance (sensitivity), sequence size, and uniqueness to a specific nut. The National Center for Biotechnology Information (NCBI) nr database searches were performed to confirm pep tide identities, and to ensure that the marker peptides chosen were not present in other nuts or common food ingredients such as barley, corn, rice, soy, and wheat. Two marker peptides were selected for each tree nut, and four were selected for peanuts. An alysis of peptide digests from grains such as barley, corn, rice, quinoa, soy, and wheat did not present interfer - ences. The peptide markers were tested to determine if they could be used to screen common foods for the presence of the 11 tree nuts and pea nut at sub - ppm levels. Foods containing nuts as listed on the label showed a response for the cor - rect nut. Foods processed using equipment also used to process other tree nuts or peanuts were in certain cases found to contain these other nuts.

This application note describes a method for the simultaneous determination of 26 carbamates and their metabolite residues in ginger by ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) based on the work published by He, et al . [1]. The ginger samples were initially extracted using acetonitrile, followed by cleanup using NH2 solid phase extraction (SPE) column. The samples were then enriched by nitrogen evaporation, redissolved in a mixture of acetonitrile:water (1:1, v:v), and analyzed by UHPLC-ESI-MS/MS. With matrix-matched standard calibration for quantitation, the method showed excellent linearity, with correlation coefficients of》=0.99 for all compounds in the examined concentration range. The limits of detection and limits of quantitation were in the ranges of 0.050–2.0 μg/kg and 0.20–5.0 μg/kg, respectively. At spiking levels of 10, 30, and 100 μg/kg, the recoveries for all compounds ranged from 70.9–119% with RSD of 1.0–11%. The method is simple, rapid, and sensitive, thus it can meet the requirements for the determination of carbamates and their metabolite residues in ginger.

The Agilent 1290 Infi nity II LC was used to analyze additives such as sweeteners, preservatives, and caffeine in various food products, beverages, and consumer toothpaste. The developed method facilitates accurate and sensitive determination of nine additives using a diode array detector (DAD) and an evaporative light scattering detector (ELSD) placed in series. After the DAD, a valve was installed to remove nonretained solutes in reversed-phase LC, which could increase the noise level of the ELSD. Total analysis time, including re-equilibration, was below 10 minutes with minimal sample preparation. Method performance was evaluated with standard solutions as well as with a series of real samples.

The determination of pesticide residues in food products is important especially for infants and children, as the quantity of food they ingest per kilogram of body weight is relatively high. Some pesticides are known or suspected endocrine disrupting chemicals (EDCs), so the potential for interference with the function of the naturally occurring hormones can severely impact a growing child, even at low concentrations. The implications of long-term, low-dose exposure through food consumption have led to interest in development of highly sensitive analytical methods that combine rapid sample preparation with hyphenated separation and detection. Most pesticide residue laboratories use some variation of the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction methods. Often the extracted material is analyzed using gas chromatography-tandem mass spectrometry (GC/MS/MS) for the thermally stable, less polar pesticides, or liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis for the less volatile and/or more polar ones. A more recently developed alternative technique involves coupling GC to triple quadrupole ICP-MS (GC-ICP-QQQ), which is able to Determination of pesticides in foods using phosphorus and sulfur detection by GC-ICP-QQQ Application note Authors Jenny Nelson1-3, Helene Hopfer1-2,4, Fabio Silva3 , Steve Wilbur3 , Jianmin Chen3 , Kumi Shiota Ozawa3 and Philip L. Wylie5 1 Department of Viticulture and Enology, University of CaliforniaDavis, Davis CA, USA 2 Food Safety and Measurement Facility, University of CaliforniaDavis, Davis CA, USA 3 Agilent Technologies, Inc., Santa Clara CA, USA 4 HM Clause, Davis CA, USA 5 Agilent Technologies, Inc., Wilmington DE, USA Food testing 2 determine pesticides by measuring the heteroatoms P and S (also Cl and Br) contained in most pesticides. GC-ICP-QQQ offers very good selectivity and specificity, and sensitivity that can be greater than the established methods. The method described in this work ca

Concern about the impact on public health from potentially toxic elements and compounds present in everyday foodstuff has led to new legislative guidance. The inorganic forms of arsenic (As) are known to be toxic and carcinogenic to humans, and food and drink are a potential source of exposure [1]. To reduce the intake of inorganic arsenic from the diet, the U.S. Food and Drug Administration (FDA) proposed a new action level for inorganic arsenic in apple juice of 10 μg/L in 2013 [2,3]. Also, following the eighth meeting of the CODEX Committee on Contaminants in Food, the World Health Organization (WHO) proposed a guideline for inorganic As in polished rice of 0.2 mg/kg [4]. There is a clear need for reliable screening methods to accurately determine the levels of such contaminants in food and drink products. The detection limits required are low, as a 0.2 mg/kg limit equates to a digestate concentration of 2 μg/L (assuming a 100x digestion dilution). Even small errors in the precision and accuracy of the analytical method could result in a food product being wrongly classified as safe. Selenium (Se) is an essential micronutrient that can be deficient in the diet as Se-poor soils yield Se-poor food crops. Accurate quantification of Se in food is necessary to assess nutrient status.

一些金属对人体来说不可或缺，而另一些则含有剧毒。因此，在食品生产的每一个阶段都需要监测痕量金属元素。 借助安捷伦的原子光谱产品系列产品 – AA、MP-AES、ICP-OES、ICP-MS（包括 ICP-MS/MS）和 HPLC-ICP-MS，能够快速筛查食品和饮料。 1，快速筛查有毒和有益的金属元素 2，分析大量元素和食品类型 3，测定痕量、微量及常量元素的浓度

一些金属对人体来说不可或缺，而另一些则含有剧毒。因此，在食品生产的每一个阶段都需要监测痕量金属元素。 借助安捷伦的原子光谱产品系列产品 – AA、MP-AES、ICP-OES、ICP-MS（包括 ICP-MS/MS）和 HPLC-ICP-MS，能够快速筛查食品和饮料。 1，快速筛查有毒和有益的金属元素 2，分析大量元素和食品类型 3，测定痕量、微量及常量元素的浓度

一些金属对人体来说不可或缺，而另一些则含有剧毒。因此，在食品生产的每一个阶段都需要监测痕量金属元素。 借助安捷伦的原子光谱产品系列产品 – AA、MP-AES、ICP-OES、ICP-MS（包括 ICP-MS/MS）和 HPLC-ICP-MS，能够快速筛查食品和饮料。 1，快速筛查有毒和有益的金属元素 2，分析大量元素和食品类型 3，测定痕量、微量及常量元素的浓度

与传统的干法、湿法消解相比，高压消解具有操作简单、消解完全、易挥发元素损失少、污染少和节能快速等优点。本实验参考国标GB5009.12《食品安全国家标准食品中铅的测定》进行检测，同时进行加标回收率实验Pb回收率为100.9%。

为保证获得优质的食品，您必须精确地检测出低含量的变质食品和掺假物并确认食品的来源及类别。 Agilent GC/MS、LC/MS 和 ICP-MS 仪器配备有功能强大的 Mass Profiler Professional 软件，可让您实现： 1，对食品样品高效、可靠的分析 2，高度自动化地运行单个软件平台 3，使用简单的方法对食品样品进行质谱分析

MA2蛋白高度测定仪操作简单，价格便宜，测量速度快 1）蛋白高度测定仪1台 尺寸：180mm 重量：400g 2）蛋质测定台：尺寸：330×300×20mm 3)哈市单位计算 1个

本实验建立了高效液相色谱-串联质谱法同时测定保健食品中维生素A、D、E质量浓度的检测方法，样品中的维生素经皂化反应后，通过高效液相色谱-串联质朴技术，可分别对保健食品中的维生素A、维生素D2、维生素D3、α-维生素E、β-维生素E、γ-维生素E、和δ-维生素E 7种脂溶性维生素进行定性和定量分析，实验的精密度和回收率能满足实际检测要求，检出限低，可用于本系统对保健食品等食品中维生素A、D、E含量的日常监测。

本文介绍A&D mx-50卤素水份测定仪在干狗粮水份测定仪上的应用，采用卤素灯加热，重复测量四次，CV值为0.68%，结果重复性良好。

岛津高效液相色谱-三重四极杆质谱联用仪LCMS-8040 同时分析九种属于指定添加物及非指定添加物的人工合成甜味剂。

Nexera-e使用全二维液相色谱法，具有一维和二维两种不同的分离模式，通过组合多维分离系统，可对常规一维LC难以分离的组分进行分离。 蒸发光散射检测（ELSD）方法是将色谱柱中溶出的洗脱液进行蒸发，从而对目标化合物进行微粒化，这种测定散射光的方法对无紫外吸收的甘油三酯检测很有效。

本文详细阐述了如何使用日立新型质谱检测器同时检测包括马来酸，戊酸，丁酸，丙酸，乳酸等在内的六种有机酸。 Chromaster 5610质谱检测器特点： 1) 不需要排气管道　 因为最大限度地控制了从质谱检测器的排放废弃体积，所以不需要排气管道。 （*测量有毒物质等时，还需要排气管道。） 2) 紧凑的设计，实现了和LC同等的安装面积 可以安装在常规的实验台上。 3) 降低N2的使用量 通过减少引进离子源的溶剂量，N2最大使用量3ml/min,大大降低成本。 (也可使用N2发生器或N2高压罐）

高效液相色谱仪（HPLC）广泛应用于医药、食品、化学、环境等与人们日常生活密切相关的领域，并从众多分析仪器中脱颖而出,备受关注。日立高效液相色谱仪 Primaide（谱锐美）追求可靠性和耐用性，确保您能长时间稳定使用，为您日常分析工作提供强有力的支持。我们向您推荐拥有50多年HPLC研发和生产经验的日立公司最新结晶——Primaide，敬请客户作为“Prime Aide”（首席助手）使用。

一贯坚持“将最先进的技术应用于最前线”信念的日立公司，立足于分析仪器的广泛应用，着眼于液相色谱仪的长期发展，继“Lachrom Elite”之后，重磅推出新型高端液相色谱仪——Chromaster！“Chromaster”是一个新造词，取自英文单词Chromatograph（色谱）和Master（大师）。这个词表达了日立公司的一个美好愿景，那就是开发和提供一套顶级的、性能卓越的液相色谱系统。作为一个强有力的工具，它将为那些受过专业训练、“大师级”的色谱工作者做出更大贡献！